Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code 11, Malfunction Indicator Light: Notes
MIL should always be on steady with ignition on and engine stopped. Ignition voltage is supplied directly to bulb. PCM turns on light by providing a path to ground.
- If MIL driver circuit or ignition feed circuit to bulb is open, MIL will not illuminate.
- Jumper Harness (J 35616-A) should be used instead of directly probing harness. This will prevent damage to harness.
- MIL should go off after engine starts. If it does, problem is not present at this time. If light does not go off, drive circuit is shorted to ground or PCM is faulty.
- If other codes exist, use other code charts first, then restart at beginning of this chart.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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